Floor construction



W. S. HUTCHINSON. FLOOR CONSTRUCTION. APPLICATION FILED MAY 15. 1919.

Patented Feb. 15, 1921.

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FIEI-El- WITNESSES mvzu'ron WILLIAM S. HUTCHINSOII, 9'3 BETHLEHEM, PENNSYLVANIA.

FLOOE CONSTRUCTION.

Specification of Letters Patent. P t t 15, 1921 Application filed Il'l'ay 15, 1919. Serial No. 297,210.

To all whom it may concern:

Be it known that 1, WILLIAM S. Huron. INsoN, a citizen of the United States, and a resident of Bethlehem, in the county of Northampton and dtate of Pennsylvania, have made a new and useful invention in Floor Construction, of which the following is a specification. V

My invention relates to buildings and particularly to floor construction in multistoried buildings whereby a more economical and efficient process of erection is ob-. tained. It is customary in certain types of building construction to erect a steel skeleton, including columns which support floor beams or girders and tospan the space between adjacent beams with a ceiling and subfloor of reinforced concrete.

One method of constructing this floor is to erect temporary forms for the pouring of the concrete and dismantle them aft-or the mixture has set. Another and growing practice is to ship to the building being erected. and there apply to the steel work, slabs of reinforced concrete which have been poured and allowed to set in permanent forms at a manufacturing plant.

If the first of these two methods is employed, it is necessary to construct a large number of forms from beam to beam, each to be used for a single pouring and then to be dismantled and again set up elsewhere at great consumption of time and labor. If the pre-cast slabs referred to in the second method are used with present methods of construction, they are applied by being placed in position with their bottom faces supported by the top faces of the floor beams. This gives rise to an objection to the use of the slabs, as it increases the distance between a ceiling and the floor above, which, in a multi-storied building, will necessitate greater height and proportional expense, less head room or fewer stories.

type of building in such a manner that the pro-cast slabs may be used for floors without the disadvantages just mentioned.

In the accompanying drawings, Figure l is a plan of a floor constructed by my proved method; and Fig. 2 is a vertical transverse section through two adjacent typical floor beams or girders with the spanning subfioor slabs in position. F1g. 3 shows a modified construction where deep floor girders are required.

My invention consists of a method of erecting this My preferred girder comprises a web plate 1, lower flange angles 2 and upper.

flange angles 3.. Lower flange angles 2 are riveted to the web plate before the girders are secured to their supporting columns which are not shown in the drawing. The upper flange angles 3 are only bolted to web 1 in the fabrication shop and afterthe glider is in place flanges 3 may be removed to allow the pro-cast slabs 61: of reinforced concrete to be placed in the position shown with their opposite lower end edges resting upon lower flanges 2 of the parallel girders.

Above removal of top flanges 8 is necessitated because flanges 3 extend laterally the same distance as flanges 2 and as slab a is made while this'flange is attached.

of greater width than the distance between 4 blabse are made in convenient. sizes .and

form unitsof the floor construction. The illustration shows a row of these units covering the 'space between webs of the parallel girders shown. The extension of these girders together with other girders form a number of similar spaces which are covered by a series of slabs supported on the lower flanges of the girders.

After the slabs have been placed in position top flange angles 3 are again assembled with the girder web, preferably by riveting. The girders are now complete and adapted to support any superimposed load which may be placed thereon up to the limit of their original design. It will be understood that the floor proper will be laid on top of the slabs and girders and may be of any desired type.

The girders shown herein are of a common type and well suited for this method of construction but other structural shapes are also'adapted to be combined in a girder provided with removable top flanges and I contemplate their use as well as the plate and angle. form illustrated. Fig. 3 illustrates a modification in which deeper girders are used but the slabs are kept near the top of the girders by the addition of supporting angles 5 to the girder web between top. and bottom flanges.

it is obvious that the principle and advantages of this method of construction may be retained if only the alternate floor girders are provided with the removable top flanges and I contemplate such likely departure from the exclusive use of removable top flanged girders. I claim 1. A step inthe process of erecting steel buildings which consists of assembling with the other steelwork, floor girders having easily removable top flanges and non-removable bottom flanges, removing said top flanges, applying floor units extending from girder to girder and supported by said bottop flanges; removing said top flanges; ap-

plying floor units extending between adjacent girders and supporting said units on the bottom flanges or" said girders; and replacing and permanently securing said top flanges.

3.1K method of constructing building floors which includes erecting a series of spaced floor girders having vertical webs and upper and lower horizontal flanges; removing said upper flanges; applying a floor unit adapted to spanthe space between the Webs of adjacent'girders and be supported by the opposed lower flanges on said Webs;

rigid floor units,

ing said units into place bodily in a tending between adjacent floor girders, and

replacing and permanently securing said top flanges to their respective girders.

5. The method of constructing buildings which includes permanently erecting spaced,

parallel, floor girders, havingvertical webs, permanent, horizontal flanges and horizontal flanges easily removably secured to said webs, removing said latter flanges, applying adapted to extend from the vertical web of one of said girders to the vertical web of an adjacent girder, by movvertical plane and supporting their edges on said permanent, horizontal flanges, reassembling said removable flanges with said girder webs and permanently riveting them thereto.

In testimony whereof, subscribed my name this 6th day of May, 1919. i

' WILLIAM s. HUrcrnNsoN,

I have hereunto 

